February 7, 1795: The 11th Amendment to the United States Constitution was ratified by the states, clarifying judicial power over foreign nationals, and limiting the ability of citizens to sue states in federal courts and under federal law.

Senators were elected by the state legislatures every two years, with one-third beginning new six-year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election.